Compressed air gun



' Nov. 9, 1937. 1. D. KELLEY JR COMPRESSED AIR GUN Filed May 4, 1956 2 Sheets-Sheet l 2 46 ea 7fe//e (97?, W r

Nov. 9, 1937. l. D. KELLEY, JR 2,098,454

COMPRESSED AIR GUN Filed May 4, 1956 2 Sheets-Sheet 2 "r 41' 39 ZQ I 3 F1 E Patented Nov. 9, 1937 UNITED STATES PATENT OFFICE oomnnssnn AIR GUN Isaac Dee Kelley, In, St. Louis, Mo. Application May 4, 1936, Serial No. 17,197

4 Claims.

This invention relates to a compressed air gun, designed and adapted for use in controlling the discharge of compressed air from the container attached to and extending into the body of the 5 instrument, and the device is specially useful for spraying liquids and medicaments.

An object of the invention is to provide an improved portable instrument for controlling and discharging compressed air through a nozzle' opening into and from a liquid container, whereby the liquid may be properly discharged in the form of a fine spray and thereby applied for its intended and desired purposes over and upon any portions of the human body, or elsewhere, as required for the application of the intended treatment.

Another object of the invention is to provide a highly simplified and a practicable instrument of the type herein disclosed and specially designed for use by physicians and surgeons in the treatment of patients requiring or needing the application of sterilizing or medicated liquids or sprays.

Various other objects of the invention should 25 be apparent from the following description, reference being made to the annexed drawings, in

which- Fig. l is a side elevation of a device embodying the invention.

30 Fig. 2 is a vertical transverse sectional view of the compressed air gun or device illustrating most of the essential features of the invention.

Fig. 3 is a bottom plan view of the device shown in Fig. 2.

35 Fig. 4 is a transverse sectional view of a part of the device shown in Fig. 2 on the line 4 of said Fig. 2.

Fig. 5'is an enlarged side elevation illustrating the puncturing device for the cartridge or shell 40 in which the compressed air or gas is contained.

Fig. 6 is a side elevation of the threaded tubular discharge member or nozzle that is screwed into the compressed air gun.

Fig. 'l is a sectional view on the line 1-1 of 45 Fig. 2.

Fig. 8 is an enlarged sectional view showing details of the invention.

The bottle or'container l is of conventional construction and is designed and adapted to con- 50 tain a liquid suitable for the desired purpose. A tube 2, as usual, extends down into the bottle or container I, has its lower end open and its upper end opening through a fixture 3 into a tube 4 having a spray discharge nozzle 5 at- 65 tached thereto, as is conventional.

As usual, the tube 4 opens across the fixture 3 and across the open upper end of the tube 2 into an injection tube 6 the outer end of which is connected with a swivel member I. A tube comprising an enlarged threaded end portion 8, a reduced threaded portion 9 and a nozzle ID has one end screwed into a member H and has its nozzle Ill extending through the swivel member I and into the tube 6. A sleeve portion I2 is screwed onto the threaded part 9 and is also externally threaded and has screwed thereon a tubular nut I3 which may be moved into and out of clamping engagement with the swivel member I to cooperate therewith in clamping said swivel member I on the tube 6 to hold the parts in proper relative adjustment.

The member H is tubular and has opening therefrom a port l4 for the discharge of air or gas. The member II is attached to a housing or casing l5 designed and adapted to receive and contain a cartridge or shell l6 holding compressed air or gas. The member Il may be screwed into or otherwise detachably secured to the part [5.

As shown, a retaining ring I! composed of brass or other appropriate material is screwed into the inner end of the member H and supports an elastic cartridge seat l8 of rubber or other appropriate elastic material. A metallic member I!) is mounted in the member ll upon the cartridge seat l8 and has a tubular punctur-' ing part extending therefrom through and beyond the cartridge seat l8 and functioning to puncture and enter the upper end of the cartridge l6 when said parts are assembled in the relationship shown in Fig. 2 of the drawings.

The wall 2i formed in the member II has a port 22 opening into the tubular puncturing portion 20, so that the compressed air or gas can pass from the cartridge l6 therethrough.

A tubular fitting 23 is screwed into the member II. A leak-proof seal is formed between the inner end of the fitting 23 and the wall 2| by an elastic gasket 24 of rubber or other appropriate material which may have a portion 25 embedded and compressed within a complementary annular groove in the inner end of said fitting 28. A support 26 is screwed into the inner end of the fitting 23 in a sufficiently loose relationship to permit compressed air or gas to pass between the support 26 and the fitting 23, notwithstanding that said parts are attached by threads as shown in Figs. 2 and 8 of the drawings. Thus, when the compressed air or gas is discharged from the cartridge or shell I6, it will pass through the puncturing tube 28, through the part 28 and thence between the periphery of the support 28 and the wall of the fitting 28, notwithstanding the fact that the support 28 and the fitting 28 are screwed one within the other.

A spring 21 within the fitting 28 has one end seated upon the support 28 and its upper end supporting a ball valve 28 which is pressed against a valve seat 28 by said spring.

The upper end of the fitting 28 is formed with a wall 80 having a port 8| opening therethrough. The valve 28 is supported by the spring 21 in position to close the opening through the valve seat 28 and thereby close the port 8|. The upper end of the fitting 28 has a diametrical slot 82 one end of which communicates with the outlet opening l8. This slot I2 functions for the double purpose of a discharge outlet and also as a facility for engaging a screw driver or other tool whereby the fitting 28 may be screwed into and out of the member I I.

The upper end of the fitting 22 is formed with a cylindrical extension 32 around which a metallic washer 88 is placed forming a part of a seal to prevent the escape of air or gas from the member II and requiring the air or gas to pass through the port i8 and thence through the nozzle tube. A rod 35 has one end extending through the port 8| and engaging the valve 28, and has its outer end screwed into a support 38 seated upon an elastic gasket 81 mounted on the washer 88. Thus, when the support 88 is forced inwardly in opposition to the resiliency or elasticity of the gasket .81, the rod 85 will open the valve 28 and permit air or gas to pass from the cartridge or shell l6 through the several passages and ports mentioned and through the tubes 8 and 8 to spray the liquid from the bottle or container I.

An angular lever comprising an arm 88 and an arm 28 has one end of the arm 38 mounted on a pivot 80. The arm 38 engages the support 88 and is operated by the arm 89 to press the support 86 downwardly in opposition to the elasticity or resiliency of the gasket 31 to cause the rod 85 to open the valve 28. Normally, the valve 28 is held closed by the spring 21, as should be understood by reference to Fig. 2 of the drawings. However, the valve 28 may be opened in opposition to the spring 21 by obvious manipulation of the angular lever 38, 88.

In order to prevent accidental opening of the valve 28, as when the instrument is being carried or transported in a physician's case or the like,

a nut 8| is -screwed on the threaded part 8 of the nozzle tube and may be screwed outwardly to prevent inward movement of the arm 88 of the angular lever.

It should be clear enough that, when the nut 8| is screwed outwardly against the arm 88 of the angular lever (Fig. 2), the angular lever cannot be operated or moved to actuate the support 86. Thus, the instrument may be locked against accidental opening of the valve.

The cartridge or shell i6 is supported in the housing or casing l5 by a supporting screw 82 having an appropriately formed concavity complementary to the rounded lower end of the cartridge or shell. When the screw 82 is operated to force the cartridge or shell upwardly and to support the cartridge or shell in its upper position, a leak-proof Joint is formed between the upper end of the cartridge or shell and the seat member I8, so that no air or gas can escape or pass between said parts. A lock device comprising a screw 88 is provided for the screw 82. The screw 88 is screwed into the lower end of the housing or casing II and may be loosened to permit manipulation of the screw 82. After the screw 82 has been moved to its proper adjustment, the screw 88 may be tightened into clamping engagement with the lower end of the screw 82 to prevent the same from becoming accidentally displaced.

As shown, I provide a base 88 into which the lower end of the housing or casing l8 extends. A clamp 88 extends through a slot 88 in the base 88 and may be screwed into the lower end of the housing or casing l5 and into clamping engagement with the supporting base 88 so as to effect rigid attachment of the parts and prevent accidental displacement or movement of one with respect to the other.

The member ll may be attached to the housing or casing II by any appropriate detachable connection. As shown, the member ii telescopes into the upper end of the housing or casing II and has in connection therewith a lug 81 (Fig. 1) engaging in a spiral or bayonet slot 88 in the upper end of the housing or casing ll. Obviously, as shown in Fig. 1, when the member H is telescoped into the upper end of the housing or casing ii, the pin or ing 81 will pass along the angular or spiral slot 88 in the manner of a bayonet attachment and will clamp the parts together so that they will be rigidly but detachably held in proper relationship for use of 'the instrument.

I am aware that this instrument may be modilied and varied in numerous particulars without departure from the nature and principle of the invention. I contemplate such variations as may be deemed useful or expedient and, without restricting myself in unessential particulars, I claim:

1. A device of the character described comprising a cartridge or shell enclosing compressed air or gas, means for puncturing and for forming a passage from said cartridge or shell for the flow of air or gas therefrom, and a support for said means having an outlet passage therethrough, a member attached to said support, an additional support mounted for sliding movements in said first named support, elastic means supporting and providing a seal for said additional support, a valve controlling passage of air or gas through and from said member, a stem attached to said additional support and engaging said valve,.a lever pivoted to said first .named support for moving said additional support in opposition to said elastic means to open said valve, and means limiting extent of movement of said lever.

2. A device of the character described comprising a cartridge or shell enclosing compressed air or gas, means for puncturing and for forming a passage from said cartridge or shell for the fiow of air or gas therefrom, and a support for said means having an outlet passage therethrough; a member attached to said support, an additional support mounted for sliding movements in said first named support, elastic means supporting and providing a seal for said additional support,

a valve controlling passage of air or gas through and from said member, a stem attached to said for closing said valve, and a device settable in 75 position to prevent accidental operation of said lever.

3. A device of the character described comprising means forming a passage for the flow of air or gas from an enclosure, an outlet tube opening into said passage, a member supporting said means, a support mounted for sliding movements in said member beyond said passage, an elastic device supporting and providing a seal for said support, a valve controlling flow of air or gas through said passage, a spring fo closing said valve, a stem attached to said support and movable thereby to move said valve to open position in opposition to said spring, a lever pivoted to said member for moving said support in opposition to said elastic device and said spring to open said valve, and means on said tube for limiting extent of movement of said lever.

4. A device of the character described comprising means forming a passage for the flow of air or gas from an enclosure, a member supporting said means, a support mounted for sliding movements in said member beyond said passage, an elastic device supporting and providing a seal for said support, a valve controlling flow of air or gas through said passage, a spring for closing said valve, a stem attached to said support and movable thereby to move said valve to open position in opposition to said spring, a lever pivoted to said member for moving said support in opposition to said elastic device and said spring'to open said valve, and a device supported by a part of said passage forming means for preventing accidental operation of said lever.

ISAAC DEE KELLEY, JR. 

